diff --git a/src/ScoreEstimator.ts b/src/ScoreEstimator.ts
index 78c09eca..507042be 100644
--- a/src/ScoreEstimator.ts
+++ b/src/ScoreEstimator.ts
@@ -47,6 +47,8 @@ export interface ScoreEstimateRequest {
     height: number;
     board_state: Array<Array<number>>;
     rules: GoEngineRules;
+    black_prisoners?: number;
+    white_prisoners?: number;
     komi?: number;
     jwt: string;
 }